Allen Bradley 1785KA5 B Control Module

The Allen-Bradley 1785-KA5 B is a communication interface module designed to function as a gateway between DH+ (Data Highway Plus) and DH485 networks. It enables seamless data exchange between PLC-5 controllers and SLC 500 controllers, making it a critical component in distributed control systems. The 1785-KA5 B is commonly used for remote I/O, supervisory control, and real-time monitoring, providing efficient data transfer across multiple industrial networks.

In Stock

Technical Specifications

  • Manufacturer: Allen-Bradley (Rockwell Automation)
  • Model: 1785-KA5 B
  • Module Type: DH+/DH485 Gateway Communication Adapter
  • Supported Networks:
    • DH+ (Data Highway Plus)
    • DH485 (Data Highway 485)
  • Backplane Current Requirement: 2.0 Amps at 5V DC
  • Communication Speed: Supports 57.6 kbps and 115.2 kbps on DH+ and DH485
  • Max DH+ Nodes Supported: 64 nodes
  • Max DH485 Nodes Supported: 32 nodes
  • Mounting Type: Rack-mounted in a PLC-5 chassis
  • Operating Temperature Range: 0°C to 60°C (32°F to 140°F)
  • Certifications: UL, CE, CSA

Key Features

  • Acts as a bridge between DH+ and DH485 networks
  • Allows PLC-5 and SLC 500 controllers to communicate efficiently
  • Supports up to 64 nodes on DH+ and 32 nodes on DH485
  • Rack-mounted design for seamless integration with PLC-5 systems
  • LED indicators for communication status and diagnostics
  • Reduces the need for additional cabling and simplifies system architecture

Compatible Allen-Bradley Components

  • Allen-Bradley PLC-5 Controllers (e.g., 1785-L40B, 1785-L60B)
  • Allen-Bradley SLC 500 Controllers with DH485 interface
  • Allen-Bradley 1771 I/O modules and chassis
  • Allen-Bradley PanelView HMI terminals with DH+ or DH485 connectivity

Industry Applications

  • Manufacturing automation and process control
  • Supervisory control and data acquisition (SCADA) systems
  • Material handling and conveyor automation
  • Oil and gas pipeline monitoring and control
  • Utility and water treatment plant automation

Installation & Operational Notes

  • Ensure correct slot placement in the PLC-5 chassis for proper operation
  • Verify proper DH+ and DH485 wiring connections to avoid communication faults
  • Use LED indicators to monitor network activity and troubleshoot issues
  • Regularly update firmware and maintain the module for optimal performance
  • Follow Allen-Bradley’s installation and configuration guidelines for seamless integration

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